David,Very solid instruction and cetnomms. And now that you’ve become the photographic counterpart to Oprah’s bookclub (i.e.–a mention of any book on Oprah sends sales through the roof; any mention of a piece of gear, etc., on strobist sends it through the roof or makes it impossible to find) the reporter in me would LOVE to know how many pro accounts Flickr is suddenly going to get after reading this installment.